Odd shape.When I looked at the photo for "As waters part, polygons appear" (SN: 6/3/06, p. 348), I didn't see a "pentagonal shape" in the swirling water. I saw a sine wave, wrapped around a circle. I was immediately reminded of the Bohr--de Broglie model of electron orbits forming standing waves. Rather than swirling water and glycol glycol (glī`kōl), dihydric alcohol in which the two hydroxyl groups are bonded to different carbon atoms; the general formula for a glycol is (CH2)n(OH)2. forming "unexplained" polygons, isn't this simply a standing-wave phenomenon? ELLERY FRAHM, MINNEAPOLIS, MINN MINN Minnesota (old style) . Combinations of circles and standing sine waves might explain the observed shapes, agrees Tomas Bohr of the Technical University of Denmark The Technical University of Denmark (Danish: Danmarks Tekniske Universitet, DTU) was founded in 1829 as the 'College of Advanced Technology' (Danish: Den Polytekniske Læreanstalt). . But his team has been unable to use the circle-sine wave model to explain how shapes vary as experimental parameters change.--P. WEISS WEISS Workshop on Industrial Experience with Systems Software |
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